n = input().strip()

x1,y1,x2,y2 = [ float(i) for i in n.split() ]

dx = abs(x1 - x2)
dy = abs(y1 - y2)

dist = ( dx**2 + dy**2) ** 0.5

print(dist) n = input().strip() n input().strip() ().strip () input strip float(i) for i in n.split() for i in n.split() i n.split() n.split n split for i in n.split() float(i) float i x1,y1,x2,y2 = [ float(i) for i in n.split() ] x1 [ float(i) for i in n.split() ] y1 x2 y2 dx = abs(x1 - x2) dx abs(x1 - x2) abs x1 - x2 x1 x2 dy = abs(y1 - y2) dy abs(y1 - y2) abs y1 - y2 y1 y2 dist = ( dx**2 + dy**2) ** 0.5 dist ( dx**2 + dy**2) ** 0.5 dx**2 + dy**2 dx**2 dx 2 dy**2 dy 2 0.5 print(dist) print dist dx = abs(x1 - x2) abs(x1 - x2) dx y2 = [ float(i) for i in n.split() ] [ float(i) for i in n.split() ] y2 x1,y1,x2,y2 = [ float(i) for i in n.split() ] [ float(i) for i in n.split() ] x1 dy = abs(y1 - y2) abs(y1 - y2) dy dist = ( dx**2 + dy**2) ** 0.5 ( dx**2 + dy**2) ** 0.5 dist y1,x2,y2 = [ float(i) for i in n.split() ] [ float(i) for i in n.split() ] y1 x2,y2 = [ float(i) for i in n.split() ] [ float(i) for i in n.split() ] x2 n = input().strip() input().strip() n
n = input().strip()

x1,y1,x2,y2 = [ float(i) for i in n.split() ]

dx = abs(x1 - x2)
dy = abs(y1 - y2)

dist = ( dx**2 + dy**2) ** 0.5

print(dist)
